Dog Surgical Diseases – External otitis

Dog Surgical Diseases – External otitis

External otitis

Cause

There are many factors that cause otitis externa, such as friction, scratching, foreign bodies, parasites, especially water immersion, which is a common cause of otitis externa. Especially small long-haired dogs, the ear canal structure is very narrow, and the coat is very long. After bathing or being drenched by rain, if water enters the ear canal, it is not easy to be discharged, causing microorganisms to develop and multiply in a humid and warm environment, causing otitis externa.

Diagnosis points

Initially, the external auditory canal was flushed, edema, and itchy, and light yellow serous secretions flowed out from the auditory canal, contaminating the coat on the lower ear. Animals are disturbed, often shaking their heads or scratching their ears. As the disease progresses, local swelling increases, or pustules appear. The discharge of brown-black foul-smelling purulent secretions often leads to the loss of ear coats or dermatitis, and the hearing loss of sick dogs. When it becomes chronic, it will be good and bad, repeated attacks, and can cause the tissues of the ear canal to thicken, and even tumors occur, leading to thickening of the auricle skin, deformation of the auricle, and hearing impairment.

Treatment

Before the treatment of acutely ill dogs, the external auditory canal should be blocked with absorbent cotton ball, and then the surrounding coat should be cut off, and the external auditory canal should be washed with normal saline, 0.1% Dodecyl dimethyl benzyl ammonium bromide or 3% hydrogen peroxide. When washing, tilt the dog’s head to the side of the affected ear to facilitate the outflow of the washing liquid. Then take out the cotton ball plugged in the ear canal, and then use a dry cotton ball to absorb the liquid in the ear canal. Examine the deep part of the external auditory canal with an otoscope,
Take out the deep foreign body, earwax or tissue fragments with ear tweezers, and finally rub the external auditory canal with boric acid glycerin (1:20) solution or tannin glycerin (1:20) solution, 2 to 3 times a day. For suppurative otitis externa, after cleaning according to the previous method, rub the ear canal with antibiotic ointment.

In severe cases, rinse 1-2 times a day, and then apply ointment. Dogs with obvious systemic symptoms can be treated with antibiotics for systemic treatment. For sick dogs with deformed ear shells or tumors, external ear drainage should be performed.

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